Printer&#39;s hook.



No. 843,648. PATENTED FEB. 12, 1907.`

T. WENSEL. I

PRINTBR'S HOUK. APPLICATION FILED JULY 1a. 1906.

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NITE STATES THEODOR WENSEL, OF ST. PAUL, MINNESOTA.

Panni-Ems HOOK.

Specification of Letters Patent.

Patented Feb. 12. 1907.

'Application iiled July 16,1906. Serial No, 326,371.,

To all whom it may concern:

Be it known that I, THEoDoR WENSEL, a citizen of the United States,residing at St. rIaul, in the county of Ramsey and State of Minnesota,have invented a new and useful Improvement in Printers Hooks, of whichthe following is a specification.

My invention. relates to locking devices commonly calledc printers hooksor clamps for stereotype and other plates.

My principal object is to provide a simple and efficient printers hook;and the invention consists, further, in the construction and combinationof the clamp-jaw, block, and screw illustrated in the drawings andhereinafter described and claimed.

In the drawings, Figure 1 is a view of my hook from above. VFig. 2 is aside view. Fig. 3 is a front view. Fig. 4 is a cent-ral longitudinalsection. Fig. 5 is a front view of the head of the screw. Fig. is alongitudinal plan of the screw. Fig. 7 is a plan ofthe clamp-jaw, andFig. 8 is aside view of the clamp-jaw.

My device comprises, essentially, three parts: first, a clamp-j aw l,provided with the hook 2 second, a block 3, formed with acentrally-threaded cavity 4 of uniform diameter and pitch, which passesthrough the entire length of the block, said block also having lslots 5,parallel with said cavity 4, located substantially midway between thetop and bottom of the block, and third, a screw botlr ends 6 and 7 ofwhich are uniform in diameter and pitch, said diameter and pitchcorresponding' with those of the central cavity 4 inthe block. The ends6 and 7 of the screw are connected by a shaft 8 of relatively v smalldiameter. l

The shaft of the screw is adapted to pass through and have its bearingin a yoke-opening 9 in the clamping-jaw, the latter being formed withside iianges 10 and 11. The fiange 10 is adapted to slide in the slots 5of the block, while the fiange 11, carrying the hook 2, moves upon theupper bearing-surfaces l2, which are formed on the top of the block. Thescrew is threaded into the central cavity bf the block. and itsconstruction as described is such that its end 6 will follow through theentire length of the central cavity of the block, and as this movementcarries with it the clamping-jaw wide adjustabilityfof the hook upon theplates is possible. The coaction between the slotted block and flangedclamping-j aw also secures accuracy of movement and rigidity of the hookwhen clamped upon a plate. The head of the screw is crossed by aplurality of slots 13, while portions of the upper surfaces l14 and 15of the block immediately adjacent to` the screw are beveled to permitthe manipulation of the screw from above when its head has receded so.that it is not readily accessible from in front-that is to say, lthisslotting of the screw and beveling of the upper surface of the blocksenables the operator in locking or unlocking a plate to turn the screwfrom in front or above, as is most convenient.

The operation of my device is obvious. As is usual aV series of theclamps are used for fastening and adjusting a plate in a chase, theedges of the plate being locked between the. hooks 2 of the clamp-jaws.The screw is actuated by inserting a tool in the slotted head, andas thescrew is turned it carries with it the clamp-j aw, which is yoked uponthe shaft 'of the s crew by means of the opening 9 in the clamp-1 aw..Thus by the manipulation' of the screw-head the plate may be gripped orreleased at the will of the operator.,

Having described my invention, what I claim as new, and desire toprotect by Letters Patent, isf- .1. A printers hook, comprising a block,'clamping-j aw and screw, ,said block containlng slots extending fromthe central cavity to the outer surfaces of the block and se: Ll jawbeing' provided with lateral flanges respectively adapted to slide inand above said slots.

2. A printers hook comprising a block, clamping-j aw and screw, saidblodli containing two longitudinalA slots extending transversely to itsouter surfaces and substantially T95' midway between its upper and lowersurfaces and a central, threaded cavi-ty of uniform diameter adapted toreceive the screw while said ,law 1s provided with lateral iangesrespectively adapted to slide in and above said roc slots.

3. A printers hook comprising a block, clamping-jaw-and screw, saidblock containing two longitudinal slots and a central,

threadedcavity of uniform diameter, parallel 105 with said slots, saidjaw, being` provided with lateral flanges adapted to slide in said slotsand. a yoke for said screw, formed to fit over the central portionthereof, while both ends of the screw are threaded in the central cavxlo ity of the block.

4. A printers hook comprising a block a central cavity and twolongitudinal I SCI'GW.

Aelarnping-jfmf and screw, said block containformed with `a centralthreadedl cavity, a l l 5. Alprinters hook comprising a bleek, l

ing two longitudinal slots and a central, i threaded cavity of uniformdiameter, parallel with said slots, said jaw, beinq provided withlateral flanges a'dapted toslide in said slots l and 'a yoke. for saidscrew formed to iit over the central portion thereof, while both en dsI5 of the screw are threaded in the central eavity of the block,wlierel);T the screw in said cavity is adapted to follow `the jaw as itmoves the length of the block.

in testimonyT 'whereof I have signed. my z'o naine to this specificationin the presence of two subscribing Witnesses.

'THEODOR WENSEL. Vitnesses':

MARY LIGHTSCHEIDL. F. G. BRADBURY.

